cdnjs is a free distributed JS library delivery service.
Internet Information Services (IIS) is an extensible web server software created by Microsoft for use with the Windows NT family.
Leaflet is the open-source JavaScript library for mobile-friendly interactive maps.
ASP.NET is an open-source, server-side web-application framework designed for web development to produce dynamic web pages.
Polyfill is a service which accepts a request for a set of browser features and returns only the polyfills that are needed by the requesting browser.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
Unpkg is a content delivery network for everything on npm.